I made some change on 1.2 branch to integrate new builders for Nested Set generation support.Until now, all is based on Joe Simms samples he provides in trac attachment but it can surely be improved.
I think it can be reused on other branches without big changes but I had to make it on 1.2 because it is the stable one used in our project.

Where can I share my code and under which format (diff, svn commit on specific branch) ?